Shears.



0,670,373; Patented Mar. l9, 19m, n. B. A. KE lSER.

' SHEARS.

(Application filed Quiz. 25, 2 Sheets-Sheet l.

l6 6 .13 v l7 INVENTOR WITNESSES Q 8 I UNTTED STATES PATENT @FFICE.

HENRY B. A. KEISER, OF EDGEWOOD, PENNSYLVANIA.

I'SHEARS.

I bPECIFICATION forming part of Letters Patent No. 670,373, dated Mar-ch19, 1901.

A Application filed October 25, 1900. Serial No. 34,307- lNo model.)

To all whom it may concern.-

Be it known that I, HENRY B. A. KEISER, of Edgewood, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Shears, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, in which- Figure 1 is a top plan view of a shearing mechanism constructed in accordance with my invention. Figs. 2 and 3 are respectively a side elevation and vertical longitudinal section, and Fig. 4 is a vertical cross-sectional View of the same.

My invention relates to shears for shearing hot or cold metal, and is designed to provide high-speed shears which may be used to shear the metal either while in motion or at rest. It is further designed to do away with cumbersome and complicated mechanisms for moving the shears during the cutting operation, and provide shearing mechanism which is moved by the bar or rod itself during cutting.

In the drawings, 2 2 represent longitudinal side pieces or guides having guiding-slots within which slide boxes 3 3, forming bearings for the trunnions'or stub-shafts 4 4 of the shears. The upper shear-blade 5 is formed. as part of a frame or forging having legs 6 6 pivoted to the stub-shafts, and the lowershear-blade 7, which slides upon the anvilblock 8,'is likewise provided with legs 9 9, pivoted to the stub-shafts outside of and in line with the legs of the upper shear-blade. -Between the legs on each shaft is provided a rearwardly-projecting plate 10, and to these plates are secured strong springs 11, whose rear ends are removably fastened to brackets 12 on the side guides. The shear-blades are normally held apart by springs 13 entering suitable recesses in the blades at each side thereof. Between the side guides extends a stationary bar or plate 14, located within the shear-blades and holding the billet or rod in proper position.

Above the upper shear-blade is located the ram 15 of a vertically-moving steam-hammer, which is arranged to give a quick downward blow to the upper shear-blade.

Both of the shear-blades are preferably recessed to fit the particular cross-section of the billet or piece, and to limit the downward movement of the upper blade I provide the shear mechanism will travel forward with it until the bar is severed, and as soon as the ram is moved upwardly the springs 13 force the blades apart and the springs 11 draw them back to their proper positions under the hammer, ready for the succeeding operation. To cut the bar while stationary, the ram is actuated in the same manner, the shears remaining in place under the ram.

The advantages of my invention result fro: the simplicity of the device, the doing away with complicated mechanism for moving the shears forward during the cutting operation, and from the fact that the shears may be used for either a stationary or a traveling bar. The operation is practically instantaneous, and hence pieces moving at a high rate of speed may be cut.

The shear-blades may be opened or closed by other mechanism than the ram and springs, such as by cam or rock-shaft connections, and many other variations may be made in the form and arrangement of the shears without departing from my invention.

I claim- 1. A shears having movable shear-blades, power-operated mechanism for opening and closing the same, and a yielding connection between the shears and framework to allow the shears to travel with the moving bar; sub stantially as described.

2. A shears having power-operating mechanism and arranged to shear a metal bar either in motion or at rest, said shears having a yielding connection to allow the shears tomove with the bar; substantially as described.

3. A sliding shears, having a yielding connection arranged to allow it to travel with the with a moving bar being sheared; substan- 15 tially as described.

6. A shears having a pair of shear-blades slidingly mounted and arranged to be moved by the bar itself, means for returning them to their normal position after the shearing operation and power mechanism for operating the shears; substantially as described.

In testimony whereof I have hereunto set my hand.

HENRY B. A. KEISER. Witnesses:

H. M. ConWIN, 0. P. BYRNES. 

